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Showing content from https://dotnet.github.io/dotNext/api/DotNext.Func.html below:

Class Func | .NEXT

Class Func

Provides extension methods for delegate Func<TResult> and predefined functions.

Namespace: DotNext Assembly: DotNext.dll Syntax Methods | Edit this page View Source AsConverter<TInput, TOutput>(Func<TInput, TOutput>)

Converts Func<T, TResult> into Converter<TInput, TOutput>.

Declaration

public static Converter<TInput, TOutput> AsConverter<TInput, TOutput>(this Func<TInput, TOutput> function)

Parameters Type Name Description Func<TInput, TOutput> function

The function to convert.

Returns Type Parameters Name Description TInput

Type of input argument.

TOutput

Return type of the converter.

| Edit this page View Source AsPredicate<T>(Func<T, bool>)

Converts Func<T, TResult> into predicate.

Declaration

public static Predicate<T> AsPredicate<T>(this Func<T, bool> predicate)

Parameters Type Name Description Func<T, bool> predicate

A delegate to convert.

Returns Type Description Predicate<T>

A delegate of type Predicate<T> referencing the same method as original delegate.

Type Parameters Name Description T

Type of predicate argument.

| Edit this page View Source Constant<T>(T)

Constructs Func<TResult> returning the same instance each call.

Declaration

public static Func<T> Constant<T>(T obj)

Parameters Type Name Description T obj

The object to be returned from the delegate.

Returns Type Description Func<T>

The delegate returning obj each call.

Type Parameters Name Description T

The type of the object to be returned from the delegate.

| Edit this page View Source Identity<T>()

The converter which returns input argument without any modifications.

Declaration

public static Func<T, T> Identity<T>()

Returns Type Description Func<T, T>

The identity function.

Type Parameters Name Description T

Type of input and output.

| Edit this page View Source Identity<T>(Action<T>)

Represents Action<T> as Func<T, TResult> which doesn't modify the input value.

Declaration

public static Func<T, T> Identity<T>(this Action<T> action)

Parameters Type Name Description Action<T> action

The action to be converted.

Returns Type Parameters Name Description T

The type of the element.

| Edit this page View Source Identity<TInput, TOutput>()

The function which returns input argument without any modifications.

Declaration

public static Func<TInput, TOutput> Identity<TInput, TOutput>() where TInput : TOutput

Returns Type Description Func<TInput, TOutput>

The identity function.

Type Parameters Name Description TInput

Type of input.

TOutput

Type of output.

| Edit this page View Source IsNotNull<T>()

Returns predicate checking that input argument is not null.

Declaration

public static Func<T, bool> IsNotNull<T>() where T : class?

Returns Type Description Func<T, bool>

The predicate instance.

Type Parameters Name Description T

Type of the predicate argument.

| Edit this page View Source IsNull<T>()

Returns predicate implementing nullability check.

Declaration

public static Func<T, bool> IsNull<T>() where T : class?

Returns Type Description Func<T, bool>

The predicate instance.

Type Parameters Name Description T

Type of predicate argument.

| Edit this page View Source IsTypeOf<T>()

Gets a predicate that can be used to check whether the specified object is of specific type.

Declaration

public static Func<object?, bool> IsTypeOf<T>()

Returns Type Parameters Name Description T

The target type.

| Edit this page View Source TryInvoke<TResult>(Func<TResult>)

Invokes function without throwing the exception.

Declaration

public static Result<TResult> TryInvoke<TResult>(this Func<TResult> function)

Parameters Type Name Description Func<TResult> function

The function to invoke.

Returns Type Description Result<TResult>

The invocation result.

Type Parameters Name Description TResult

The result type.

| Edit this page View Source TryInvoke<T1, T2, T3, T4, T5, T6, T7, T8, T9, TResult>(Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, TResult>, T1, T2, T3, T4, T5, T6, T7, T8, T9)

Invokes function without throwing the exception.

Declaration

public static Result<TResult> TryInvoke<T1, T2, T3, T4, T5, T6, T7, T8, T9, TResult>(this Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, TResult> function, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6, T7 arg7, T8 arg8, T9 arg9)

Parameters Type Name Description Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, TResult> function

The function to invoke.

T1 arg1

The first function argument.

T2 arg2

The second function argument.

T3 arg3

The third function argument.

T4 arg4

The fourth function argument.

T5 arg5

The fifth function argument.

T6 arg6

The sixth function argument.

T7 arg7

The seventh function argument.

T8 arg8

The eighth function argument.

T9 arg9

The ninth function argument.

Returns Type Description Result<TResult>

The invocation result.

Type Parameters Name Description T1

The type of the first function argument.

T2

The type of the second function argument.

T3

The type of the third function argument.

T4

The type of the fourth function argument.

T5

The type of the fifth function argument.

T6

The type of the sixth function argument.

T7

The type of the seventh function argument.

T8

The type of the eighth function argument.

T9

The type of the ninth function argument.

TResult

The result type.

| Edit this page View Source TryInvoke<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, TResult>(Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, TResult>, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10)

Invokes function without throwing the exception.

Declaration

public static Result<TResult> TryInvoke<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, TResult>(this Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, TResult> function, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6, T7 arg7, T8 arg8, T9 arg9, T10 arg10)

Parameters Type Name Description Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, TResult> function

The function to invoke.

T1 arg1

The first function argument.

T2 arg2

The second function argument.

T3 arg3

The third function argument.

T4 arg4

The fourth function argument.

T5 arg5

The fifth function argument.

T6 arg6

The sixth function argument.

T7 arg7

The seventh function argument.

T8 arg8

The eighth function argument.

T9 arg9

The ninth function argument.

T10 arg10

The tenth function argument.

Returns Type Description Result<TResult>

The invocation result.

Type Parameters Name Description T1

The type of the first function argument.

T2

The type of the second function argument.

T3

The type of the third function argument.

T4

The type of the fourth function argument.

T5

The type of the fifth function argument.

T6

The type of the sixth function argument.

T7

The type of the seventh function argument.

T8

The type of the eighth function argument.

T9

The type of the ninth function argument.

T10

The type of the tenth function argument.

TResult

The result type.

| Edit this page View Source TryInvoke<T, TResult>(Func<T, TResult>, T)

Invokes function without throwing the exception.

Declaration

public static Result<TResult> TryInvoke<T, TResult>(this Func<T, TResult> function, T arg)

Parameters Type Name Description Func<T, TResult> function

The function to invoke.

T arg

The first function argument.

Returns Type Description Result<TResult>

The invocation result.

Type Parameters Name Description T

The type of the first function argument.

TResult

The result type.

| Edit this page View Source TryInvoke<T1, T2, TResult>(Func<T1, T2, TResult>, T1, T2)

Invokes function without throwing the exception.

Declaration

public static Result<TResult> TryInvoke<T1, T2, TResult>(this Func<T1, T2, TResult> function, T1 arg1, T2 arg2)

Parameters Type Name Description Func<T1, T2, TResult> function

The function to invoke.

T1 arg1

The first function argument.

T2 arg2

The second function argument.

Returns Type Description Result<TResult>

The invocation result.

Type Parameters Name Description T1

The type of the first function argument.

T2

The type of the second function argument.

TResult

The result type.

| Edit this page View Source TryInvoke<T1, T2, T3, TResult>(Func<T1, T2, T3, TResult>, T1, T2, T3)

Invokes function without throwing the exception.

Declaration

public static Result<TResult> TryInvoke<T1, T2, T3, TResult>(this Func<T1, T2, T3, TResult> function, T1 arg1, T2 arg2, T3 arg3)

Parameters Type Name Description Func<T1, T2, T3, TResult> function

The function to invoke.

T1 arg1

The first function argument.

T2 arg2

The second function argument.

T3 arg3

The third function argument.

Returns Type Description Result<TResult>

The invocation result.

Type Parameters Name Description T1

The type of the first function argument.

T2

The type of the second function argument.

T3

The type of the third function argument.

TResult

The result type.

| Edit this page View Source TryInvoke<T1, T2, T3, T4, TResult>(Func<T1, T2, T3, T4, TResult>, T1, T2, T3, T4)

Invokes function without throwing the exception.

Declaration

public static Result<TResult> TryInvoke<T1, T2, T3, T4, TResult>(this Func<T1, T2, T3, T4, TResult> function, T1 arg1, T2 arg2, T3 arg3, T4 arg4)

Parameters Type Name Description Func<T1, T2, T3, T4, TResult> function

The function to invoke.

T1 arg1

The first function argument.

T2 arg2

The second function argument.

T3 arg3

The third function argument.

T4 arg4

The fourth function argument.

Returns Type Description Result<TResult>

The invocation result.

Type Parameters Name Description T1

The type of the first function argument.

T2

The type of the second function argument.

T3

The type of the third function argument.

T4

The type of the fourth function argument.

TResult

The result type.

| Edit this page View Source TryInvoke<T1, T2, T3, T4, T5, TResult>(Func<T1, T2, T3, T4, T5, TResult>, T1, T2, T3, T4, T5)

Invokes function without throwing the exception.

Declaration

public static Result<TResult> TryInvoke<T1, T2, T3, T4, T5, TResult>(this Func<T1, T2, T3, T4, T5, TResult> function, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5)

Parameters Type Name Description Func<T1, T2, T3, T4, T5, TResult> function

The function to invoke.

T1 arg1

The first function argument.

T2 arg2

The second function argument.

T3 arg3

The third function argument.

T4 arg4

The fourth function argument.

T5 arg5

The fifth function argument.

Returns Type Description Result<TResult>

The invocation result.

Type Parameters Name Description T1

The type of the first function argument.

T2

The type of the second function argument.

T3

The type of the third function argument.

T4

The type of the fourth function argument.

T5

The type of the fifth function argument.

TResult

The result type.

| Edit this page View Source TryInvoke<T1, T2, T3, T4, T5, T6, TResult>(Func<T1, T2, T3, T4, T5, T6, TResult>, T1, T2, T3, T4, T5, T6)

Invokes function without throwing the exception.

Declaration

public static Result<TResult> TryInvoke<T1, T2, T3, T4, T5, T6, TResult>(this Func<T1, T2, T3, T4, T5, T6, TResult> function, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6)

Parameters Type Name Description Func<T1, T2, T3, T4, T5, T6, TResult> function

The function to invoke.

T1 arg1

The first function argument.

T2 arg2

The second function argument.

T3 arg3

The third function argument.

T4 arg4

The fourth function argument.

T5 arg5

The fifth function argument.

T6 arg6

The sixth function argument.

Returns Type Description Result<TResult>

The invocation result.

Type Parameters Name Description T1

The type of the first function argument.

T2

The type of the second function argument.

T3

The type of the third function argument.

T4

The type of the fourth function argument.

T5

The type of the fifth function argument.

T6

The type of the sixth function argument.

TResult

The result type.

| Edit this page View Source TryInvoke<T1, T2, T3, T4, T5, T6, T7, TResult>(Func<T1, T2, T3, T4, T5, T6, T7, TResult>, T1, T2, T3, T4, T5, T6, T7)

Invokes function without throwing the exception.

Declaration

public static Result<TResult> TryInvoke<T1, T2, T3, T4, T5, T6, T7, TResult>(this Func<T1, T2, T3, T4, T5, T6, T7, TResult> function, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6, T7 arg7)

Parameters Type Name Description Func<T1, T2, T3, T4, T5, T6, T7, TResult> function

The function to invoke.

T1 arg1

The first function argument.

T2 arg2

The second function argument.

T3 arg3

The third function argument.

T4 arg4

The fourth function argument.

T5 arg5

The fifth function argument.

T6 arg6

The sixth function argument.

T7 arg7

The seventh function argument.

Returns Type Description Result<TResult>

The invocation result.

Type Parameters Name Description T1

The type of the first function argument.

T2

The type of the second function argument.

T3

The type of the third function argument.

T4

The type of the fourth function argument.

T5

The type of the fifth function argument.

T6

The type of the sixth function argument.

T7

The type of the seventh function argument.

TResult

The result type.

| Edit this page View Source TryInvoke<T1, T2, T3, T4, T5, T6, T7, T8, TResult>(Func<T1, T2, T3, T4, T5, T6, T7, T8, TResult>, T1, T2, T3, T4, T5, T6, T7, T8)

Invokes function without throwing the exception.

Declaration

public static Result<TResult> TryInvoke<T1, T2, T3, T4, T5, T6, T7, T8, TResult>(this Func<T1, T2, T3, T4, T5, T6, T7, T8, TResult> function, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6, T7 arg7, T8 arg8)

Parameters Type Name Description Func<T1, T2, T3, T4, T5, T6, T7, T8, TResult> function

The function to invoke.

T1 arg1

The first function argument.

T2 arg2

The second function argument.

T3 arg3

The third function argument.

T4 arg4

The fourth function argument.

T5 arg5

The fifth function argument.

T6 arg6

The sixth function argument.

T7 arg7

The seventh function argument.

T8 arg8

The eighth function argument.

Returns Type Description Result<TResult>

The invocation result.

Type Parameters Name Description T1

The type of the first function argument.

T2

The type of the second function argument.

T3

The type of the third function argument.

T4

The type of the fourth function argument.

T5

The type of the fifth function argument.

T6

The type of the sixth function argument.

T7

The type of the seventh function argument.

T8

The type of the eighth function argument.

TResult

The result type.

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